Electron spin resonance and molecular orbital study of radicals in irradiated fluoro-derivatives
作者:A. Faucitano、A. Buttafava、F. Faucitano Martinotti、G. Caporiccio、C. Corti
DOI:10.1039/p29810000425
日期:——
employed to study the radicals produced by low temperature irradiation by a 60Co source of a number of fluoro and fluoro-chloro derivatives including chloroformyl- and fluoroformyl-perfluoropolyethers, trichlorofluoromethane, 1,1,2-trichloro-1,2,2-trifluoroethane, and perfluoro-1-methyldecalin (PFMD). The major radiolysis process in the acyl chloride is thought to be dissociative electron capture with
采用低温基质分离技术和esr光谱技术研究了由60 Co来源的多种氟和氟代氯衍生物(包括氯甲酰基-和氟甲酰基-全氟聚醚,三氯氟甲烷,1,1, 2-三氯-1,2,2-三氟乙烷和全氟-1-甲基十氢化萘(PFMD)。酰氯中主要的辐射分解过程被认为是离解性电子捕获并形成酰基。RR'CF·和RCF 2的鉴定也推导了链中C–O键的分裂· 物种。在酰氟中,为了说明RCF 2 ·的相对产率较高(相对于酰氯而言),还假定COF基团的直接拆分。PFMD的辐射在低温下会产生RR'CF·和RCF 2 ·,并且在加热到160–180 K之后会产生1-perfluoro-1-methyldecalin-8a-yl自由基。该自由基的光谱与平均平面一致在C-8a进行配置。通过CFCL的照射3和CF 2 ClCFCl 2(硫脲笼形物)·CFCL 2和CF 2 ClĊFCl获得; 这些自由基的结构和构象已通过CNDO / 2 MO方法进行了研究。